Yeah, I'm not seeing how she's a masochist. If anything, she's a bit of an exhibitionist who likes to dominate herself while the guy she likes watches. Can it really be called "masochism" when you like dominating yourself? Could it be called "sadism"?
I guess those are meaningless questions lol. I'll just sit back and enjoy the sweet vanilla masochist story...until the obvious, "lesbian who wants to ntr the MC" shows up. These types of manga can't help themselves, but to insert some weird yuri bs.